Hi Jack,
> Combien de mapservice, imageservice, geoprocessing service peut gérer ArcGIS Server 10.4?
Your question is much too broad and generalized, and can be affected by many factors such as: size of the dataset(s) within the map services, amount of raster imagery for the image services, what exactly the tasks do in the geoprocessing services, etc.
A good place to start for capacity planning: Capacity Planning Tool - GIS Wiki | The GIS Encyclopedia
This topic may also provide some background: Single-machine deployment—Documentation (10.4) | ArcGIS Enterprise
Hope this helps,
