Are you saying that you want to see all the names that have a score of 1 in the "A" column? That would be filtering rather than sorting. Excel has a rather neat feature called AutoFilter that does exactly that.
1) Select all of your data, including the header labels
2) In Windows Excel, you would find the AutoFilter item under the Data menu after you choose Filter... I hope the procedure is somewhat similar in your version of Excel
3) You will now see an arrow to the right of each column header label. If you click on the one for the "A" column, you will see a dropdown menu. Choose the value you want. If you choose 1, only those rows containing a 1 will appear. All others will be hidden by the filter.
Brad