For a 2-tail test (which this seems to be), with 80 dof and ɑ=0.1, the critical value from t-tables is 1.664.
If the T value is (2.3-2)/(2.3/√81)=1.17 as the test statistic, then 1.17<1.664, so the null hypothesis would be rejected, which means that the claim is incorrect and the standard deviation is not 2.0 minutes.
Initial conclusion may be that from the sample result, the population standard deviation is not 2.0 minutes, because the sample has SD=2.3 minutes.
The given test statistic of 105.8 doesn’t seem to tally with the other data. Perhaps it’s the mean commute time?