A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution that is approximately normal with mean μ = 84 and standard deviation of σ = 26 What is the probability that, for an adult after a 12-hour fast, x is less than 81?