Display formula result if cell is X cells away from text value

First time posting, and I do not know the keywords to search for this issue. I'll describe the best I can.

I would like to have a variable timeline that will change the contents & visibility of the cell based on a value.

The attached example shows 3 scenarios that I would like the results to be, by only changing the Months After Launch cell.

Example A, is 3 months so there is calculation & display 3 cells over
Example B, is 5 months so there is calculation & display 5 cells over
Example C, is 7 months so there is calculation & display 7 cells over

How can I make this dynamic?

Thanks in advance,