The building elevations are only listing those two rooftop boxes seen here on either end of the building. The highest part of the building is that center rooftop box, but its height isn't listed on the elevations. I measured it with a piece of paper and marked it, then compared the height. I used the roof line of that center rooftop box and went down to the main roof line, which is at 158.5 feet. Then I used my two lines I drew and went down the building to see if they lined up with any of the floor heights. The floor to floor height of the 11th floor is 15 feet, which just so happens to match the lines I drew. So adding 15 feet to the 158.5 foot main roof line gives you a height of 173.5 feet for that highest roof top box in the center of the building.
Maybe someone else can measure the elevations to see if they get anything different.