It's asking you to mark the total length of 5 bookmarks on the number line. Your number line is equal to one foot, and each bookmark is one eighth of a foot. Five of those would be five eighths of the foot. The mark you draw should be five eighths of the number line. The middle point is four eighths and already marked, so you just need to add a mark one eighth over. It should go where your six is on the number line above.
