Mate, what Moshiri has done is this:
He's acquired 17,465 shares from existing shareholders giving him a 49.9% stake. He will have the agreement of the existing large shareholders particularly Woods and Kenwright to start making the changes he feels necessary for the club as a business to run better. He will also no doubt, continue conversations with Liverpool City Council to see if a suitable solution can be found for either a new stadium or a redeveloped Goodison. He will have a budget in mind as to the likely costs and will have discussed this already with Kenwright.
In the next few months he will prioritise the areas that need capital, and once the amount of capital required is determined , it is most likely the club will issue more shares which he will purchase thereby making him the majority holder. He may also acquire further shares from existing shareholders around the same time.
So for example lets say for argument sake he decides to inject £150,000,000 into the club for initial funding of the stadium solution, working capital and some squad additions.
Using a pre money valuation of £175,000,000 the club would issue with shareholder approval, 30,000 shares valued at £5,000 each. Moshiri would acquire all the shares, putting £150,000,000 into the club. He would then own 47,465 shares of the 65,000 shares in issue giving him 73.02% of the club. If he purchased a further 1285 shares he would have 75% giving him total control. The new shares issued may be the same class as existing shares or may carry some preferences in terms of voting or dividends - however dividends are not going to be the issue here.
He might have the agreement of existing shareholders to acquire the rest of their shares upon different benchmarks - for example, agreement of stadium, initial stadium works, or completion of stadium - those details may or may not come out into the public domain.
His initial purchase is just the first phase - it enables him to make the changes necessary to prepare the business for the capital it requires - he will fund the capital in return for an increased stake in the business. This is standard business practice.