An article Adding Excel Lat Long Coordinates into ArcGIS in GISGeography provides a detailed, quick and easy approach to solve your question.

An article Adding Excel Lat Long Coordinates into ArcGIS in GISGeography provides a detailed, quick and easy approach to solve your question.

1. Convert degrees/minutes/seconds to decimal degrees (X field should equal longitude. The Y field should equal latitude);
2. Ensure data frame is set to WGS 1984;
3. Add Excel table to ArcMap;
4. Display XY Data;
5. Save as feature class.