Pubic hair pulled higher from tummy tuck?

If the pubic hair is pulled up with a tummy tuck, that is poor surgical technique. Women who undergo a TT, have laxity in the pubic area as well. An "aged" pubic area tends to be more horizontal (wider than taller) as opposed to a young woman in her 20's with a more vertical orientation of the pubic triangle. With a TT, the pubic area gets rejuvenated, but it is important to suture the pubic soft tissues under the skin to the underlying fascia to prevent migration toward the belly button. Also, I personally, make my TT incisions low at the pubic bone level. Talk to your plastic surgeon, look at his/her TT photos and incisions to see if you like what you see. Good luck.

If this is a major concern then be sure to communicate this with your surgeon. The tummy tuck can be designed to avoid this problem. 

This is usually technique related. Deep fascia suturing is the most important stitch placed. However some patients can form weak scar tissue that may contribute to this suboptimal result.