Need help with dimensioning

Hi, so I'm practicing for the CSWP. I'm currently working on a segment 2 sample exam, and for the last problem, it's asking to change the angle of part of the extrude. However, when I try changing the angles, it makes the end much smaller than it's suppose to be based on what's supposed to look like at the end.

I'm not sure how else to approach it, so any advice on what can I do to make the angles not shrink the end so much would be great.

My answer: