Harry is in a line and he finds that he is 8^th from the start and 5^th from the end of the line.

If 6 people are added to the line in front of Harry, then how many people will be there in the line?

Before there were 7 people ahead of Harry + Harry + 4 people behind Harry.

So, there were 7 + 1 + 4 = 12 people in the line.

Now if 6 more are added, then the total in the line is 12 + 6 = 18 people.