Answer:
SOCIAL ZONE
Explanation:
Social Zone is the distance adopted by individuals usually in a formal relationship like in this case, Sansa the salesperson and the buyer. The social zone is defined as the area of 1.25 to 3.5 m (4–11½ ft) from a person. Given the average width if a desk is between 0.7 to 1.5 m, they are well within the stated range for the social zone.
It is the distance an individual leaves between themselves and another individual.
Another common example apart from salesperson and buyer is the distance between a client and his lawyer.