69 Dart door glass alignment...

I don't believe that the car had a sagging door when the quarter was hung. The car was only 2 months old when he crashed it.
I measured the height of the glass at the rear of the door with the window all the way up. The drivers side was 3/8" lower than the passenger side is. So the glass is the problem. It is not parallel to the weather stripping. So it seems that I will have to tilt the front track. to get the rear of the glass up. I did check the roller and it is still intact.
Does anyone know what this stud in the picture adjusts?

View attachment 1715090079
That is the eccentric stop in the regulator although I do believe it limits down travel.