The height is 20 feet taller than 500 feet, or 500+20=<<20+500=520>>520 feet.
The structure is 234 feet wider than it is tall, or a width of 520+234=754 feet wide.
Therefore, the sum of the height and width of the Great Pyramid of Giza is 520+754=<<520+754=1274>>1274 feet.
#### 1274