Approximately how far, in cm, does the blood move during one beat?

What appears to be another given is a plot relating the rate of heatbeat and time. Distance is the integral of speed with respect to time. This corresponds to the area under a v-t graph. Taking the height of the triangle to be 0.75m/s and the base to be 0.32s which gives distance of beat equal to  7.5cm 

The salt in the sea water dehydrated the sailor because her body could not take in the amount to salt in the sea water