In the first order the mass of a runner is proportional to the square of his height (i.e. constant BMI). The force exerted by the runner is roughly proportional to his mass. Combining these two assumptions we get that the force exerted by a runner is approximately proportional to his height^2.
The force of the wind on the runner is roughly linear with the area of the projection of the runner's body onto his frontal/coronal plane (his "silhouette"). The total body surface area of a person can be estimated as constant*width^0.425 * height^0.725. Assuming that a runner's width is proportional to his height, we get that the total body surface is proportional to his height^1.15. The projection onto the frontal plane will grow at about the same order. That means that the force of the wind on the runner is approximately proportional to his height^1.15.
In summary, the force exerted by the runner grows with his height^2 whereas the counter-force from the wind only grows with his height^1.15. We can conclude that the taller the runner, the less impact the wind will have on his running.