Vogue 8898...Problems

It's early.  A little too early.  Well, I made it.  Vogue 8898 is a beautiful dress... at least the picture on the envelope is.  My version was extremely large.  I removed 4.5 inches . From the sides.  I added 2 inches to the length.  Now I need to figure out how to fix the arm holes.  After doing some research I think I need to do a full bust adjustment (FBA).  Every site shows how to do it on a pattern but how do I do it on a garment?

On another note I am working on a bag for my daughter.  Last night, I cut the pattern on outer fabric but I forgot to buy some lining.  I guess I have some shopping to do after work.