Question regarding demand schedule and equilibrium consumption
Yes, he is referring to a movement along the demand line. If the individual purchases less than $Q_0$, than the demand line would be higher than the price for quantities for $Q_0$, this means that the individual values consumption more than its cost (its price). Graphically, you just need to show that for a quantity less than $Q_0$, the demand line is higher than the price, i.e. the individual values consumption more than its cost.