You can check the viability of the egg by candling it. While in a dark room, take a pen-light flashlight and hold it to the side of the egg. The light will illuminate the inside of the egg. You will see veins on the inside surface of the egg if it's viable. If you don't see any veins, it's unfertilized (no good).

With respect to the denting, it looks ok from here. Just make sure the humidity is acceptable (high humidity) in your incubator and your temps are ok (89F).

I hope this helps and good luck!