Word Problems: When to Use Mean, Median, and Mode

Last week there was an art exhibition at a local gallery. The exhibition lasted for five days. $234$ people attended on Day One, $285$ people attended on Days Two and Three, $298$ people attended on Day Four, and $247$ people attended on Day Five.

The gallery owner has decided to open the exhibition one more day, and $289$ people attended the exhibition.

How did the mean, median, or mode of the data set containing the amounts of people attending the exhibition change after Day Six?