To-date who has flown farthest from the center of the Earth? Is he alive now?
Currently, the crew of Apollo 13 holds the record for highest altitude above earth with 400,171 kilometers (248,655 mi) on 7:21 pm EST, April 14, 1970 (source: Wikipedia). That would be 406,542 km when measured from the center of the earth.
The crew members were:
It should, however, be noted that this record wasn't intentional. The original mission plan was to enter a low Moon orbit, send the lander to the surface and back, and then return to earth. But due to a technical malfunction of the service module during the flight from earth to moon, the moon landing was canceled and the mission returned back to earth on a free return trajectory which lead it further away from earth than any of the other Apollo flights.