Take a look at the original sentence again:
Alphonso does not care as much about comfort as he does about
style he will wear, for example, a long
sleeve shirt and a leather jacket in the middle of a Florida summer if they
are the perfect complement to his new pair of khakis.
You chose to fix it the correct way:
Alphonso does not care as much about comfort as he does about
style; he will wear, for example, a long
sleeve shirt and a leather jacket in the middle of a Florida summer if they
are the perfect complement to his new pair of khakis.
Alphonso does not care as much about comfort as he does about style is a complete sentence. He will wear, for example, a long sleeve shirt and a leather jacket ... begins the second complete sentence. You are always correct when you use a semicolon to join two complete sentences that are closely related in meaning.