Draw a line L on the paper and mark a point A on it.
Take a compass and place its metal point at zero mark of the ruler.
Adjust the compass such that the pencil point gets placed at the point which is 6 small points from the mark of 7cm to 8cm of the ruler.
Take the compass to L such that its metal point is on A.
Mark a small mark at B on the line L corresponding to the pencil point of the compass.
AB is the required segment of 7.6cm.
