So you over exposed Tri-X by 2 stops and the scene was low in contrast to begin with. (meaning tonal range was narrow)
If you PULL this, meaning develop shorter, you will end up with really flat negative - even flatter than the scene itself.
If you process this normally, you will end up with dense negative but with expected contrast. On the plus side, you'll have good shadow detail.
On the negative side, you risk losing highlight - BUT you said it was a low contrast scene, so I assume there were no extremes. Tri-X can do much more than 10 zones, you may just be taking advantage of this...
Recalling your scene, were there any extreme in highlight? If so, was it sufficient to reach the high end of tonal range of the negative itself?? You said low contrast and foggy. So I'm guessing no.
If no, I'd just develop it normally and just expect long exposure in printing time.