Regarding the column thing.
I just suggested that, because of the spacing / tabs or whatever, the excel importer was not seeing the data correctly and was trying to import the whole file as a series of column (ie not row by row), that's why you ran out of columns.
Ask them to send you it in standard csv (comma separated) style. Then, hopefully excel would be able to interpret it correctly.
And, by the way, you should be able to import csv directly into Arc without going through excel.
When you get it into a point feature class, you will need spatial analyst to "rasterise" it.
And, because these points seem to be on a very regular grid, it looks to me as if this is a "text dump" of a raster anyway. Each row represents the cell centre coordinates and value.
Is this coming from Geosoft? If so, get them to send just the original geosoft "*.grd" files. This is Geosoft's own propriety raster format. You can download a plugin from geosoft for ArcGIS, which will enable you to read the raster, then save to an Arc format like file geodb or tiff.
And, don't forget about the coordinate system for this data.