Another view...(which I found after the above assessment) 
Thanks. I saw that other picture just a little while ago.
I think it’s higher than that. The siding used there is “beaded smooth” Hardieplank. It has a 7” exposure. There are 11 planks painted, for a total of 77”. I count 4.25 bricks there of regular residential type. Each brick is 2.25”. That gives us 9.5” for brick. 86.5” total, or 7’ 2.5”.
http://www.jameshardie.com/homeowner/products_siding_hardieplankLapSiding.py
http://www.thebricksite.com/
I think it would be very interesting to have Mr. McKinney demonstrate his reach next to the graffiti.