Yeah my head cannon has always seen the int score as a multiple of 10 to approximately equal to an IQ score. I know WATC doesn’t really do it that way. An eight would be an IQ of 80ish. I have a cousin who’s IQ is in the 80’s. She is rathe dimwitted, but in all aspects she is a normal person that can hold a great conversation with. She is a hard worker and normal in all respects. Granted she could never be a PhD and she was never able to graduate high school (never dropped out, she just couldn’t get the credits she needed). So, yeah in D&D terms she would not be a mage type. She could be any martial character, bard even.