Answer:
Arc FGH is 168
Step-by-step explanation:
Do you see how angle F is right on the edge of the circle? This is called an inscribed angle. Now extend the arms of the angle with your pencil to point H and again from J to F. Put a dot on each of those two points, H and F. The distance from F to H, which must go through G, is called an arc, and the measure of this arc distance is always double the included angle. So 84 X 2 = 168
