According to local authorities, the staff and tourists were in safe condition after the quake, which hit the region at 9:05 am Tuesday (Beijing Time).
The new height is 86 cms more than the previous measurement.
Local officials said no casualties have been reported due to Wednesday's quake that hit the Madoi County in Golog Tibetan Autonomous Prefecture of Qinghai province of northwest China at 3:44 pm (Beijing time), tremors for which were also felt in north-eastern Nepal.
Beijing Mayor Liu Qi made the promise in the city's bid to host the 2008 Olympic Games.
Mount Everest moved three centimetres during the recent devastating earthquakes in Nepal but contrary to earlier reports the height of world's tallest mountain has not been affected, Chinese official monitoring agency said.
The 7.9 Richter Scale temblor that struck Nepal on Saturday also affected parts of Tibet. The two border ports to Nepal were seriously affected.
China plans to build a 540-kilometre strategic high-speed rail link between Tibet and Nepal passing through a tunnel under Mount Everest, a move that could raise alarm in India about the Communist giant's growing influence in its neighbourhood.
For one, triangles are involved.
What does one do when one day, out of the blue, one is told to go on a road trip to the Everest Base Camp?