Yes, but.
#1. He can be your dependent if he lived with you more than half the year, and did not provide more than half his own support, and meets the age test (a full time student under 24). If he moves in the fall, then he would have lived with you more than half of 2017. You can't claim him for 2018 because he will not have lived at home half the year and he earns over $4050.
However,
#2, being away at college is usually considered a "temporary absence" and he would be credited with living with you assuming he would have lived with you if not at college. Just getting a dorm or apartment in another state is not necessarily breaking that home residency requirement. Even living in a dorm or apartment, he might be considered to "live with you" for tax purposes, especially if the apartment is temporary and he comes home for summers. There is no black line rule, it depends on the facts and circumstances. So you will need to consider the application of this rule to see if he can be claimed as a dependent for 2018.
