Find point given angle and two points

Question

I have the following problem. I have tried searching through some previous articles but most were written problems without visuals and I could not follow to know if this has been asked before (I'm sure it has).

Any help would be greatly appreciated!

I need to solve the value of y in the following diagram:

Image for reference (embedding isn't available for me...)

Answer 1

Received a solution from another forum.

Here it is for posterity:

link