Final answer:
In a negatively skewed distribution, Chris, who scored at the mode, would have the highest score because the mode is typically the highest among the mean and median in such distributions.
Step-by-step explanation:
In a negatively skewed distribution, the mean is typically lower than both the median and the mode. Given that Tom scored at the mean, Mary at the median, and Chris at the mode, and considering the nature of a negatively skewed distribution, Chris, who scored at the mode, would have the highest score among the three. In negatively skewed distributions, the mode is the highest value, followed by the median, and then the mean as the smallest.