99% usage is normal if you are mining
the 184 is your TDP limit (if you didn't change it from 100% in Afterburner than this is the real TDP of your card).
depends from what you mine you can optimize your settings now in Afterburner.
My power setting in Afterburner is 85%, not 100!
So you have ~ 215W TDP, due to your setting down to 85% you are at 184 TDP but you are even not close to that limit.
And the values from that program seem to be correct as if i take ~ 50W for the rest of the computer + adding all values there from my GPU's im close to the W i take from wall - the few W on top are the normal loss through efficiency of PSU.