Nay, He was running a business and trying to make a sale based on possibly something he has seen either portrayed in media or through trends. If he had accused her of something like shoplifting, or badgered her or adjusted the way he had spoke to her versus other customers, than maybe.
Also one thing, Racism isn't prejudice, we all tend to size up people based on the way they look or dress. If it was desheveled white man(meaning he looks homeless) or looked like a meth addict than chances are we are going to judge them differently than someone with a business suit on.