The ASROCK n68c-gs-fx can only use 95 WATT AM3+ processors. If you already have the motherboard, then don't get an APU. Get a 95 WATT FX series processor such as the FX-6300 or FX-8300. If you plan to game, you will also need a graphics card.
If you don't have the motherboard, then like pit_1209 said, the A10-6800k needs a FM2 motherboard, like he linked. Let us know if you have any other questions.