In my case there was no shortening of height that I'm aware of, I think if there's any truth to this then it would probably only affect your height like a half inch to an inch max, however, if there is a lot of muscle mass to your body, you can imagine how that would take away a lot of the looking big because of shoulder and arms muscles. A woman and a man that are the same height, often don't look like they would be, simply because men have the strapping look to the shoulders and arms.
Another thing is your width, wether HRT turns out to do a good job and you become curvy ( more likely if you are already slightly overweight). Or if you are very skinny then that tends to elongate people. So that's something to think about. Make the dimensions of your body be in proportion won't make you shorter but will help make you look good. Also contrasting your tops with your bottom clothing helps when very tall as it divides your dimensions, whereas wearing let's say denim with a navy top will elongate you as there's no clear line of division.
The same tricks work the opposite ways for those who seek to add height if too short some tgirls might be short but bulky. Adding some visual length might add softness you need, or maybe you are average height or tall but with a typically male torso, in this case adding height to the legs with pinstripe pants or straight leg jeans helps elongate them and give your torso a more feminine look by comparison.
It's surprising how tall you are with a father and mother at such short height, regardless, you can just own being a beautiful tall woman and shop at long tall sally!

there is one thing though, you will have to make sure your mannerisms and behaviour are pretty fem and up to standard as tall women usually get more attention than short ones.
Good luck xx