I cook chicken until aboout 170 in the thighs.. Or until the thighs are done by the fist test..
Make a soft fist and touch that little muscle between your thumb and the index finger knuckle. Raw chicken feels like that. Tighten the fist as if you are holding a broom or sovel vertically. Poke that muscle again. Almost done chicken feels like that. This is the type of doneness that makes women tilt thier heads sideways and poke at the meat while asking, " is this chicken done
Now tighten the fist like your holding a heavy metal rod. Poke muscle. This is done chicken that nobody will complain about.
Fist trick works for beef steaks also... rare, med rare and ruined..