Answer
See the figure below.
Work Step by Step
First, we need to draw a series of equally spaced, 1 cm, vertical lines to represent the equilibrium positions of particles before the wave arrives.
And as we see from the given graph, the longitudinal wave has a positive amplitude of 0.5 cm from $x = 3$ to cm $x= 8$ cm.
Hence, the particles from 3 to 8 cm have to be displaced 0.5 cm to the right.
See the figure below.