If a telekinetic lifts a 1 kg rock to a height of 1 m, he has done 9.8 Joules of work on the rock. Where did the energy come from? What decreased in energy by 9.8 Joules to maintain conservation of energy?

(may be broke/outdated!)
If a telekinetic lifts a 1 kg rock to a height of 1 m, he has done 9.8 Joules of work on the rock. Where did the energy come from? What decreased in energy by 9.8 Joules to maintain conservation of energy?