How important is body language while dealing with customers?

Many cultures use body language and some people do not realize what they are communicating to others... so know with what culture you are dealing with and get acquainted with  their body language ... with a large chance it is not all to different of yours in the first place (if you are coming from a culture communicating with  body language). 

To answer the question ... yes body language is important dealing with a customer 

Body language influences a customer’s perspective of your business right from the first phone call. The friendliness of the answering voice and the enthusiasm in the employee’s voice can make the difference between a customer choosing to come in to your business and choosing to go elsewhere.

In addition to the provided answers, I would add that body language is an important gesture in communication and while talking to others. Making the right body language while talking to the customers reflects another way of respect and professionalism.

As per my opinion, the body language i.e., gestures, postures, communication skills are of utmost importance while dealing with your customers in any field. If you are dealing with your customer with shoulders down, you will surely loose the business whereas with confidence and positive body language and attitude, you might be a successful businessman