Depending on how the building is designed it can be at least 130 feet.
Edit: Seems like he didn't jump as high as they claimed.
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Amazon employee reportedly injured after jumping off company building in Seattle
An Amazon employee was injured after he reportedly jumped off a building at the company’s Seattle headquarters campus Monday morning.
The Seattle Fire Department told SeattlePI.com that the man leapt from a rooftop about four stories high at the 12-story Apollo building at Ninth Avenue North and Thomas Street, and
he fell about 20 feet to a balcony below. He was taken to Seattle’s Harborview Medical Center with non life-threatening injuries.