I certainly think 4in is wishful thinking. Over the years I've lost about half an inch, so I am about 5ft 7in tall. But that could simply be due to age.
However, the biggest change I have experienced is my feet, which were size 8.5 (UK) when I started in the 80s and have been for the past 20 years or so a comfortable size 7 (UK). But that could be simply the "foot binding" effect of forcing them into smaller shoes. I hated them when they were size 8.5, now they look lovely.
Regarding your height, I would say try to avoid very high heels. A TG friend of mine who is the same height as me, has been described by a mutual aquaintance as being 6ft tall.
I can't persuade her to wear smaller heels.
The good news is, there are plenty of women these days who are your height, so don't worry about it. It's much more important to come across as feminine, with your body movements and voice. Crack that and your height will not be an issue.
Best of luck with your future. Remember, it only gets better.
Caroline