User blog:TecnaSport/6th grade math check

I have a problem that I'm kind of stuck on. My dad says it's a 6th grade problem. I don't think so. It's

How many degrees Celsius (°C) is 167°F? Use the formula below.

When I got stuck, dad gave me a hint. He said it's either 269 °C, 111 °C, 75 °C, or 333 °C.

I have no idea what so ever how to solve this. I don't want to jump to conclusions, but for some reason think it's 75 °C

'''I would like any help or conclusions I admit that am feeling a bit confused. Okay, totally confused. Thanks!'''