Answer
If the outlier is removed, standard deviation will decrease, but there will be no change in IQR (it may change slightly as removing one value from the data set may change the quartiles, which would change IQR.
Work Step by Step
If the outlier is removed, standard deviation will decrease, but there will be no change in IQR (it may change slightly as removing one value from the data set may change the quartiles, which would change IQR.