It seems like you're referring to a graph of a normally distributed random variable, but the image or graph itself wasn't uploaded. To help answer the questions about the mean, standard deviation, percentage of values, and z-scores, I would need to either see the graph or have numerical details about it (e.g., the range, labels, or any specific values mentioned).

Could you upload the graph or provide more details about it, like the numbers on the axes or any key points? That would help me assist you accurately.

Feel free to upload the image, and I'll be ready to analyze it!