He's at least 6' tall.
Check out this IG post:
We can derive his height from the boards on the wall.
The reception desk to his right is likely around the standard height of 40-42". The ADA compliant reception desk to his left is likely 30-33". Based on that, the boards are about 7.5 to 8.0-inches tall.
I found other photos of the lobby of that building (sign on the wall says "The Eva") to confirm their height.
https://lh3.googleusercontent.com/p/AF1QipMXVyI2pm1qKjoRgc_tWajx6fe8fYoxAm44tA7i=s2104-w784-h2104-rw
The lobby ceiling is 18 boards tall. If the boards are ~8" tall, that would make the ceiling of the lobby 12' tall, which is clearly accurate, and can be confirmed by looking at the cabinets in the lobby.
That's a standard cabinet and countertop, which means a standard 36-inch counter height. The lobby ceiling is almost exactly 4 cabinets tall, which is 12 feet.
My estimate that the boards are each 7.5-8.0-inches tall is confirmed. If they were "off the shelf" boards, they're most likely 7.5 inches. They they were cut for the job from, say, ply, they are probably 8 inches.
So that's the range for the board height.
As for XG, Looking at the original photos, he's at least 9.5- boards tall, but not much more than 9.75 boards tall.
So here are the ranges:
9.5 x 7.5" = 71.25" (just under 6' tall)
9.5 x 7.5" = 76" inches (6'4")
9.75 x 8" = 73.125" (6' 1")
9.75 x 8" = 78" (6' 6")
Whichever is right, he's definitely not short.