Hi Ali,
I am considering that you have a point shapefile in ITRF 2005 coordinate system, & UTM_35S is the correct UTM zone for your study area.
Now, open a blank map, Define the dataframe's coordinate system to WGS84 UTM Zone 35S.
Add the above data to ArcMap. Right-click the layer > Data > Export Data. Use the same coordinate system as the data frame.
N.B.: ITRF is a GCS (unit: Degree Decimal)
UTM is a PCS (unit: meters)
Thus, the values' range of the extents would differ.
Think Location