Very important! The cleaner shaven, the more presentable, the more convincing the selling aspect.
Selling insurance is more then just selling a policy, it's selling YOURSELF and your credibility to a prospective client. If your looks are dubious, your credibility will be precieved as such.
You don't have to look like Brad Pitt to be successful, BUT you have to be clean shaven, nicely dressed, have a presentable hair style, and congenial. All this goes a long way in impressing the client. And believe me, impressions are everything when it comes to selling ANYTHING!!!