To calculate the z-score for a number in a dataset, you need to follow the formula:

$z = \frac{X - \mu}{\sigma}$

Where:

• $X$ is the value for which you want to calculate the z-score.
• $\mu$ is the mean of the dataset.
• $\sigma$ is the standard deviation of the dataset.

Please provide the dataset or the specific number for which you want to calculate the z-score. Alternatively, you can upload a photo of the dataset.