Answer:
It suggests that the Sheriff is going to attempt to act professionally.
Explanation:
This is the main way in which the use of the word "official" affects the mood of the scene. In this scene, we learn that the sheriff changes his demeanour suddenly. He moves away from the stove and unbuttons his overcoat. We also learn that the movement of the sheriff indicates he will behave professionally. This might urge the reader to pay more attention to the words or to take the following actions more seriously.
